Killer B Motorsport 4-1 Holy Header Exhaust Manifold w/ V Band Upipe 2002-2014 WRX / 2004-2021 STI / 2004-2013 Forester XT / 2004-2009 Outback XT / 2004-2009 Legacy GT YMM_2005_Forester and easy tunability that have

and easy tunability that have made the Deatschwerks Subaru injectors the #1 choice of top Subaru tuners around the US and world

Flywheel Type: Streetlite

complementing the heavy-duty pressure plate

causing instability and reduced braking efficiency

Finish: Black anodized or coated for corrosion resistance

Killer B Motorsport 4-1 Holy Header Exhaust Manifold w/ V Band Upipe 2002-2014 WRX / 2004-2021 STI / 2004-2013 Forester XT / 2004-2009 Outback XT / 2004-2009 Legacy GT YMM_2005_Forester and easy tunability that haveThe Killer B Motorsport Holy Header was developed using state of the art CAD software & simulations to determine optimal design to increase power in the mid to high RPM range. Short as possible primaries with a single secondary significantly decrease header volume allowing exhaust gas pressure to build quickly. Symmetrical 4 1 design maintains high and consistent exhaust velocity as RPMs rise. You can expect faster spool up time compared to long